Bug 2456415

Summary: CVE-2026-28390 389-ds-base: OpenSSL: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing [fedora-42]
Product: [Fedora] Fedora Reporter: Vipul Nair <vinair>
Component: 389-ds-baseAssignee: Viktor Ashirov <vashirov>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: medium    
Version: 42CC: abokovoy, jachapma, mreynolds, spichugi, tbordaz, vashirov
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---Flags: fedora-admin-xmlrpc: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["b5e373d5-c5e4-40c1-8c22-a6066dc9d4e6"]}
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2026-04-08 10:47:16 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2456314    

Description Vipul Nair 2026-04-08 09:34:46 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Comment 1 Viktor Ashirov 2026-04-08 10:47:16 UTC 
The vulnerability requires calling `CMS_decrypt()` on untrusted input. 389-ds-base uses NSS as the primary crypto library. OpenSSL is used only in limited use cases:
1. pwdchan plugin uses `openssl` Rust crate for PBKDF2 password hashing.
2. lib389 shells out to `openssl` CLI for certificate inspection (x509, req, pkcs12, rehash) - not used for CMS decryption.
OpenSSL CMS API is not used by 389-ds-base at all. Closing as not a bug.